Confidence level Critical value 0.90 z* 1.645 0.95 z* = 1.960 0.99 z* 2.576 353722.1630146.qx3zqy7 Start In a poll of 1000 randomly selected voters in a local election, 497 voters were in favor of school bond measures. What is the sample proportion p? Ex: 0.123 What is the margin of error m for the 90% confidence level? Ex: 0.123

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